Generic implementation of CompareContextElement.

src/renderer/parameters_context.rs

@@ -142,16 +142,3 @@ impl Walkable for String {
         Err(WalkError::CantWalk)
     }
 }
-
-impl CompareContextElement for String {
-    fn to_any(&self) -> &dyn Any {
-        self
-    }
-
-    fn equals(&self, other: &dyn ContextElement) -> bool {
-        other
-            .to_any()
-            .downcast_ref::<Self>()
-            .map_or(false, |a| self == a)
-    }
-}